CHEM101 Lecture 4: Bohr Model and Quantum Theory
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CHEM101 Full Course Notes
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Chem 101 - lecture 4 - bohr model and quantum theory. Practise problem set 2, questions 1 - 4. Classical mechanics predicts that the electron would collapse into the positive nucleus, contrary to observations. Bohr"s model blends classical and quantum theories. There is one (and only one) electron moving in a circular orbit around the nucleus. The electron has only a fixed set of allowed orbits. The electron can only have a certain finite energies (also known as quantums) R = rydberg"s constant = 2. 178 x 10-18 j. Z = nuclear charge = number of protons = atomic number. N = integer value, beginning at 1, going to infinity. n cannot equal 0. For he+ z = 2, li 2+ z= 3. Radius of an orbit = a x n2 where a=0. 053 nm (this explains how each subsequent orbit gets further and further away from the nucleus)